The effective operators of Eq. (REF ) will contribute to the scattering process \(pp\rightarrow \tau ^\pm \mu ^\mp X_h\) , where \(X_h\)  stands for final hadrons. In this Section, we estimate the upper bound on \(|C_1^\mu +C_3^\mu |/\Lambda ^2\)  that can be obtained at the LHC at present and in the future. (For related work, see [1]}, [2]}, [3]}, [4]}, [5]}
and, in particular, [6]}, [7]}.)
